added deprecation notice to run_tests.py
added deprecation notice to run_tests.py


Former-commit-id: a94ec4b6bd7c33ae007af659d49a4298a5b12ab1 [formerly a94ec4b6bd7c33ae007af659d49a4298a5b12ab1 [formerly c367336fa42acb395aa96f1d0fccee491badaeda]]
Former-commit-id: 0b8a441b41200326032142c475ae6e67ce72925c
Former-commit-id: 91fcd39a35f0b8e3002a8c694fd64cf648800cec
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine